
yes it depends on the author. it was not explicitly stated, but implied here http://www.mangago.zone/read-manga/kurui_naku_no_wa_boku_no_ban_beta/uu/cf203d7f927b9b0e489e385c7deba601_chapter-7/pg-28/
and after ch7's release, sensei actually confirmed on her twitter that bonds in kuruboku can be broken. tho it wasnt explained how. i hope that we can see how it works on shiratori and sumi.

http://fanndists.tumblr.com/post/115147143334/amp
The explanations here are quite elaborate for every ABO universe so I think it's quite reliable info

http://fanndists.tumblr.com/post/115147143334/amp
The explanations here are quite elaborate for every ABO universe so I think it's quite reliable info
"Presence of the alpha during the omega’s heat is required to maintain a mating bond; if the alpha is absent and the omega suffers an unsuppressed heat, with or without another partner, the pheromonal bond will fade away and the omega will no longer smell claimed. Other alphas will likely make advances."
AS LONG AS SHIRATORI ISN'T AROUND UTOU HAS A CHANCE HECK YEAH!